package com.heima.wemedia.service.impl;

import com.alibaba.fastjson.JSONArray;
import com.baomidou.mybatisplus.core.toolkit.Wrappers;
import com.heima.apis.article.IArticleClient;
import com.heima.common.aliyun.GreenImageScan;
import com.heima.common.aliyun.GreenTextScan;
import com.heima.file.service.FileStorageService;
import com.heima.model.article.dtos.ArticleDto;
import com.heima.model.common.dtos.ResponseResult;
import com.heima.model.wemedia.pojos.WmChannel;
import com.heima.model.wemedia.pojos.WmNews;
import com.heima.model.wemedia.pojos.WmSensitive;
import com.heima.model.wemedia.pojos.WmUser;
import com.heima.utils.common.SensitiveWordUtil;
import com.heima.wemedia.mapper.WmChannelMapper;
import com.heima.wemedia.mapper.WmNewsMapper;
import com.heima.wemedia.mapper.WmSensitiveMapper;
import com.heima.wemedia.mapper.WmUserMapper;
import com.heima.wemedia.service.WmNewsAutoScanService;
import lombok.extern.slf4j.Slf4j;
import org.apache.commons.lang3.StringUtils;
import org.springframework.beans.BeanUtils;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.scheduling.annotation.Async;
import org.springframework.stereotype.Service;
import org.springframework.transaction.annotation.Transactional;

import javax.annotation.Resource;
import java.util.*;
import java.util.stream.Collectors;

@Slf4j
@Service
@Transactional
public class WmNewsAutoScanServiceImpl implements WmNewsAutoScanService {


    @Autowired
    private WmNewsMapper wmNewsMapper;

    // 自媒体文章自动审核

    @Async // TODO 标明方法是异步方法
    @Override
    public void autoScanWmNews(Integer id) {

        // 1. 查询自媒体文章
        WmNews wmNews = wmNewsMapper.selectById(id);

        if (wmNews == null) {
            throw new RuntimeException("WmNewsAutoScanServiceImpl--文章不存在");
        }


        if (wmNews.getStatus().equals(WmNews.Status.SUBMIT.getCode())) {

            // 从内容中提取纯文本内容和图片
            Map<String, Object> textAndImages = handleTextAndImages(wmNews);

            // 自管理的敏感词过滤
            boolean isSensitive = handleSensitiveScan((String)textAndImages.get("content"),wmNews);
            if (!isSensitive) return;


            // 2. 审核文本内容 阿里云接口
            boolean isTextScan = handleTextScan((String) textAndImages.get("content"), wmNews);
            if (!isTextScan) {
                return;
            }


            // 3. 审核图片 阿里云接口
            boolean isImageScan = handleImageScan((List<String>) textAndImages.get("images"),wmNews);
            if (!isImageScan) return;

            // 4. 审核成功 保存到APP端的相关文章数据
            ResponseResult result = saveAppArticle(wmNews);

            if (!result.getCode().equals(200)) {
                throw new RuntimeException("WmNewsAutoScanServiceImpl-文章审核，保存app端文章数据失败");
            }

            // 回填 article-id
            wmNews.setArticleId((Long) result.getData());

            updateWmNews(wmNews,(short) 9 , "审核成功");

        }


    }



    @Autowired
    private WmSensitiveMapper wmSensitiveMapper;


    /**
     * TODO 自管理敏感词审核
     * @param content
     * @param wmNews
     * @return
     */
    private boolean handleSensitiveScan(String content, WmNews wmNews) {

        boolean flag = true;

        // 获取所有的敏感词
        List<WmSensitive> wmSensitives = wmSensitiveMapper
                .selectList(Wrappers.<WmSensitive>lambdaQuery().select(WmSensitive::getSensitives));

        List<String> sensitiveList = wmSensitives.stream().map(WmSensitive::getSensitives).collect(Collectors.toList());

        // 初始化敏感词库
        SensitiveWordUtil.initMap(sensitiveList);

        // 查看文章中是否包含敏感词
        Map<String, Integer> map = SensitiveWordUtil.matchWords(content);

        if (map.size()>0) {
            updateWmNews(wmNews,(short)2,"当前文章存在违规内容" + map);
            flag = false;
        }

        return flag;
    }


    @Resource
    private IArticleClient articleClient;

    @Autowired
    private WmChannelMapper wmChannelMapper;

    @Autowired
    private WmUserMapper wmUserMapper;


    /**
     * 保存App端先关的文章数据
     * @param wmNews
     */
    private ResponseResult saveAppArticle(WmNews wmNews) {

        ArticleDto dto = new ArticleDto();
        // 属性拷贝
        BeanUtils.copyProperties(wmNews,dto);

        // 设置文章的布局
        dto.setLayout(wmNews.getType());

        // 频道
        WmChannel wmChannel = wmChannelMapper.selectById(wmNews.getChannelId());
        if (wmChannel != null) {
            dto.setChannelName(wmChannel.getName());
        }

        // 作者
        dto.setAuthorId(wmNews.getUserId().longValue());
        WmUser wmUser = wmUserMapper.selectById(wmNews.getUserId());

        if (wmUser != null) {
            dto.setAuthorName(wmUser.getName());
        }

        // 设置文章的 ID
        if (wmNews.getArticleId() != null){
            dto.setId(wmNews.getArticleId());
        }

        dto.setCreatedTime(new Date());

        ResponseResult responseResult = articleClient.saveArticle(dto);

        return responseResult;

    }


    @Resource
    private GreenImageScan greenImageScan;

    @Autowired
    private FileStorageService fileStorageService;

    /**
     * TODO 审核图片
     * @param images
     * @param wmNews
     * @return
     */
    private boolean handleImageScan(List<String> images, WmNews wmNews) {

        // 1. 从 minio中 下载图片
        // 图片去重
        images = images.stream().distinct().collect(Collectors.toList());

//        List<byte []> imageList = new ArrayList<>();

        for (String image : images) {
            byte[] bytes = fileStorageService.downLoadFile(image);
//            imageList.add(bytes);

            // TODO 审核图片
//            greenImageScan.imageScanStrongLocalVersion(bytes);

        }




        return true;
    }


    @Resource
    private GreenTextScan greenTextScan;

    /**
     * @param content
     * @param wmNews
     * @return
     * @ 审核纯文本内容
     */
    private boolean handleTextScan(String content, WmNews wmNews) {


        boolean flag = true;


        if ((wmNews.getTitle() + "-" + content).length() == 0) {
            return flag;
        }


        try {
            Map map = greenTextScan.greenTextScanStrongVersion(content);

            // TODO 文本审核成功
            if (map != null && map.get("suggestion").equals("pass")) {
                return true;
            }

            // TODO 文本审核失败
            if (map.get("suggestion").equals("block")) {
                flag = false;
                updateWmNews(wmNews, 2, "当前文章内容存在违规内容");
            }

            // TODO 不确定审核 需要人工审核
            if (map.get("suggestion").equals("review")) {
                flag = false;
                updateWmNews(wmNews, 3, "当前文章存在不确定内容");
            }


        } catch (Exception e) {
            flag = false;
            e.printStackTrace();

        }
        return flag;
    }


    /**
     * @param wmNews
     * @param status
     * @param reason
     * @ 修改文章内容
     */
    private void updateWmNews(WmNews wmNews, int status, String reason) {
        wmNews.setStatus((short) status);
        wmNews.setReason(reason);
        wmNewsMapper.updateById(wmNews);
    }


    /**
     * @param wmNews
     * @return
     * @ 1. 自媒体文章内容中提取文本和图片
     * 2. 提取文章的封面图片
     */
    private Map<String, Object> handleTextAndImages(WmNews wmNews) {

        // 存储纯文本内容
        StringBuilder stringBuilder = new StringBuilder();
        List<String> images = new ArrayList<>();


        // TODO 1. 从自媒体文章的《内容中》提取《文本和图片》
        if (StringUtils.isNoneBlank(wmNews.getContent())) {
            List<Map> maps = JSONArray.parseArray(wmNews.getContent(), Map.class);
            for (Map map : maps) {

                // 内容是文本
                if (map.get("type").equals("text")) {
                    stringBuilder.append(map.get("value"));
                }

                // 内容是图片
                if (map.get("type").equals("image")) {
                    images.add((String) map.get("value"));
                }
            }
        }


        // 2. TODO 提取《文章封面》 的 《图片》
        if (StringUtils.isNoneBlank(wmNews.getImages())) {
            String[] split = wmNews.getImages().split(",");
            images.addAll(Arrays.asList(split));
        }

        HashMap<String, Object> resultMap = new HashMap<>();
        resultMap.put("content", stringBuilder.toString());
        resultMap.put("images", images);


        return resultMap;

    }
}
